Wrench



May 29, 3923.

G. W. CARY WRENCH Filed Oct. 22 1919 INVBN T n R GEIJRGEW CARY- ATTURNEYPatented May as, 12a

siren ears were GEORGE W. CARY, 01F GREENFIELD, IVTASSACHUSETTS.

WRENCH.

Application filed October 22, 1919. Serial No. 332,543.

To all whom it may concern:

Be it known that GEORGE W. CARY, citizen of the United States ofAmerica, residing at Greenfield, in the county of Franklin and State ofMassachusetts, has invented certain new and useful Improvements inWrenches, of which the following is a specification.

This invention relates to improvements in wrenches and its leadingobject is to provide a wrench which can be used for manipulating partsand bolts and nuts and which will readily adjust itself to various sizepipes, bolts, and nuts, and exert a positive gripping action on thework.

Anotherobject of the invention is the provision of a wrench having apivoted jaw which may be quickly released by finger pressure upon anoperating lever.

With the above and other objects in view the invention relates tocertain new and use- .i'ul constructions, combinations and arrangementsof parts, clearly described in the following specification and fullyillustrated in the coming drawings, in which;

Fig. l is a side elevation of the improved wrench showing the jaw in itsnormal position.

Fig. 2 is a similar view showing a ortion of the side of the body of thewrench roken away to expose the connection between the lever and theswinging jaw, the swinging jaw being shown in its open position.

Fig. 3 is a front elevation of the upper portion of the wrench showingthe movable jaw in its normal position.

Referring to the accompanying drawings 5 designates the handle which isprovided or formed with a longitudinal slot 6, lea-ving walls 7 and 8preferably integral with the handle 5. A rigid jaw 9 is disposed againstthe upper ends of the side walls-7 and 8 and is formed with a portion 9which fits between the terminal portions of the walls 7 and 8 and issecured thereto by means of rivets or the like 10. The rigid jaw 9 isformed with sharp work biting teeth 11 which are arranged in an are onthe upper surface of the jaw.

A movable jaw 12 is formed with an arm 13 which is pivotally secured bythe pivot 14: between the side walls 7 and 8. The arm 13 is formed withgear teeth 13 which mesh with the gear teeth 15 of the releasing lever16 which is pivotally mounted between the walls 7 and 8 upon the pin orrivet 17 The lever 16 is formed with an arm 16 which is equipped with asmall projection 18 surrounded by the outer end of the coil spring 19which has its inner ends fitted in the socket 20 formed in the handle 5,so as to exert tension against the lever 16 to nor mally hold the arm 16in its outward position and to hold the jaw 12 in its normal closedposition as shown inv Fig. l.

The movable jaw 12 is formed with an upper row of inclined work bitingteeth 12 and a lower row of similar teeth 12 which are angularly relatedto each other. The teeth 12 and 12 are inclined in an opposite directionto the teeth 11 oi": the rigid jaw 9. The handle 5 may be of any lengthand the proportion shown is merely illustrated of one type of a wrenchembodying the invention.

The teeth of the rigid jaw 9 are adapted to prevent the work turning inone direction by biting into the work and the teeth of the movable jaware adapted into the opposite side of the work so that the movable jawwill be drawn more closely against the rigid jaw and the work positivelyclamped between the two jaws. When the wrench is turned in the oppositedirection the jaws will easily slide over the work, thus permit-ting ofquick operation. By a thumb or finger pressure upon the lever 16 themovable jaw will be disengaged from the work and the wrench will bequickly withdrawn.

Having described my invention I claim- A wrench comprising a handlehaving a jaw-holding head on one end, said head being laterally enlargedand longitudinally slotted, a rigid jaw supported by the sides formed bythe slot in said head and having a series of teeth disposed in theconvex curve, certain of said teeth being located along the innermostside of the jaw in substantial axial alignment with the handle, amovable jaw having an arm pivotally supported in the slot and providedwith two rows of gripping teeth, one row being disposed at an obliqueangle of the other row and the two rows having a common meeting point sothat the teeth of said movable,

jaw will converge away from the teeth of the rigid jaw toward saidmeeting point said arm hgwgingsegmental g9l13l3ebh therein, a lever'proirided in thexslb't all said jaw 5 holding head and having segmentalteethv toward the first named handle, and a spring bearing atone endagainst the handle and at the other end agair et eaid leyer tp I nain-10 tain (the/movable 'Ifjaw t wa-rd the rigid jaw.

Signed Greenfield, Mass.

GEORGE W. cam.

